A volunteer in a giant panda suit greets patrons at the entrance to the National Zoo on the first day of its reopening since the end of the 16-day U.S. federal government shutdown in Washington, ... more&nbsp

A volunteer in a giant panda suit greets patrons at the entrance to the National Zoo on the first day of its reopening since the end of the 16-day U.S. federal government shutdown in Washington, October 18, 2013. Most of the Smithsonian Institution's museums and other facilities re-opened on Thursday, including the National Zoo's popular online Panda Cam, though traffic was so heavy that it took some doing to see it. The zoo reopened on Friday. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS BUSINESS EMPLOYMENT ANIMALS TRAVEL) less&nbsp